| Reservoir monitoring and continuous model updating using ensemble Kalman filter G Nævdal, LM Johnsen, SI Aanonsen, EH Vefring SPE journal 10 (01), 66-74, 2005 | 550 | 2005 |
| Near-well reservoir monitoring through ensemble Kalman filter N Geir, T Mannseth, EH Vefring SPE Improved Oil Recovery Conference?, SPE-75235-MS, 2002 | 283 | 2002 |
| Improved reservoir management through optimal control and continuous model updating DR Brouwer, G Nœvdal, JD Jansen, EH Vefring, CV Kruijsdijk SPE Annual Technical Conference and Exhibition?, SPE-90149-MS, 2004 | 226 | 2004 |
| Effects of focusing on the nonlinear interaction between two collinear finite amplitude sound beams JN Tjo/tta, S Tjo/tta, EH Vefring The Journal of the Acoustical Society of America 89 (3), 1017-1027, 1991 | 147 | 1991 |
| A new approach for dynamic optimization of waterflooding problems RJ Lorentzen, AM Berg, G Naevdal, EH Vefring SPE Intelligent Energy International Conference and Exhibition, SPE-99690-MS, 2006 | 142 | 2006 |
| Underbalanced and low-head drilling operations: Real time interpretation of measured data and operational support RJ Lorentzen, KK Fjelde, J Frøyen, ACVM Lage, G Nævdal, EH Vefring SPE Annual Technical Conference and Exhibition?, SPE-71384-MS, 2001 | 101 | 2001 |
| Propagation and interaction of two collinear finite amplitude sound beams J Naze Tjo/tta, S Tjo/tta, EH Vefring The Journal of the Acoustical Society of America 88 (6), 2859-2870, 1990 | 93 | 1990 |
| Tuning of computer model parameters in managed-pressure drilling applications using an unscented-kalman-filter technique JE Gravdal, RJ Lorentzen, KK Fjelde, EH Vefring SPE Journal 15 (03), 856-866, 2010 | 66 | 2010 |
| Underbalanced drilling: Real time data interpretation and decision support RJ Lorentzen, KK Fjelde, J Frøyen, ACVM Lage, G Nævdal, EH Vefring SPE/IADC Drilling Conference and Exhibition, SPE-67693-MS, 2001 | 60 | 2001 |
| Comparison of results from an advanced gas kick simulator with surface and downhole data from full scale gas kick experiments in an inclined well R Rommetveit, EH Vefring SPE Annual Technical Conference and Exhibition?, SPE-22558-MS, 1991 | 60 | 1991 |
| Monitoring and control of drilling utilizing continuously updated process models FP Iversen, E Cayeux, EW Dvergsnes, JE Gravdal, EH Vefring, ... SPE/IADC Drilling Conference and Exhibition, SPE-99207-MS, 2006 | 57 | 2006 |
| Adaptive observer for kick detection and switched control for bottomhole pressure regulation and kick attenuation during managed pressure drilling J Zhou, G Nygaard, JM Godhavn, Ø Breyholtz, EH Vefring Proceedings of the 2010 American Control Conference, 3765-3770, 2010 | 52 | 2010 |
| Reservoir characterization during underbalanced drilling (UBD): Methodology and active tests EH Vefring, G Nygaard, RJ Lorentzen, G Naevdal, KK Fjelde SPE Journal 11 (02), 181-192, 2006 | 49 | 2006 |
| Optimization of well trajectory under uncertainty for proactive geosteering Y Chen, RJ Lorentzen, EH Vefring SPE Journal 20 (02), 368-383, 2015 | 45 | 2015 |
| Reservoir characterization during underbalanced drilling: Methodology, accuracy, and necessary data EH Vefring, G Nygaard, KK Fjelde, RJ Lorentzen, G Nævdal, A Merlo SPE Annual Technical Conference and Exhibition?, SPE-77530-MS, 2002 | 44 | 2002 |
| A dynamic model for underbalanced drilling with coiled tubing R Rommetveit, EH Vefring, Z Wang, R RF-Rogaland, T Bieseman, ... SPE/IADC Drilling Conference and Exhibition, SPE-29363-MS, 1995 | 40 | 1995 |
| Optimization of displacement efficiency during primary cementing EH Vefring, KS Bjorkevoll, SA Hansen, N Sterri, O Saevareid, B Aas, ... SPE Latin America and Caribbean Petroleum Engineering Conference, SPE-39009-MS, 1997 | 39 | 1997 |
| Reservoir characterization during ubd: Methodology and active tests EH Vefring, G Nygaard, RJ Lorentzen, G Nævdal, KK Fjelde SPE/IADC Managed Pressure Drilling and Underbalanced Operations Conference …, 2003 | 36 | 2003 |
| An advanced kick simulator for high angle and horizontal wells-part I EH Vefring, Z Wang, S Gaard, GF Bach SPE/IADC Drilling Conference and Exhibition, SPE-29345-MS, 1995 | 35 | 1995 |
| Bottomhole pressure control during drilling operations in gas-dominant wells GH Nygaard, EH Vefring, KK Fjelde, G Nævdal, RJ Lorentzen, ... SPE Journal 12 (01), 49-61, 2007 | 32 | 2007 |
